The causes and effects of antibiotic resistance

The suit of clothess and effects of antibiotic drug confrontationThe development of antibiotic resistance in bacterium is an example of the process of natural selection.Bacteria, like only organisms, atomic number 18 componenttically variable. These variations occur by natural sportswoman giving rise to new alleles of genes. Natural selection crapper change the frequency of these alleles in the population so that about of the bacterium in the population are resistant, by the followers steps:? Within natural populations of bacteria, some individuals have alleles of genes which revert resistance to a particular antibiotic? bacteria cause an infection, leading to treatment of the septic person with antibiotic? the antibiotic depart kill susceptible bacteria, but resistant bacteria will survive? only the resistant bacteria will reproduce, resulting in an increase in the frequency of the bacteria that are resistant to that particular antibiotic? there will be an increase in allele frequency for the allele of the gene that gives resistance in the population of bacteria? people infected in the future are infected by bacteria more likely to carry the alleles for resistanceDuring the second half of the 20th century, there was an increasing and widespread use of a firm range of antibiotics. The result has been that many strains of bacteria have been accomplished which are resistant to a variety ofantibiotics.

The alleles of genes that cause resistance arise for the first time by mutation. Such genes are often located on plasmids, which means that they can speedily spread fromone bacterial species to another since plasmids arenaturally exchanged between species. The plasmids whitethorn also contain a number of different antibiotic resistancegenes so that species can suddenly acquire resistance to a number of antibiotics when before they had none. Such populations of bacteria that are today resistant to anumber of different antibiotics, may cause infections that are exceedingly difficult to treat.

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